i just got 4 feeders about 30lbs each. When I got them they were drinking from a rubber pan. When I first brought them home I watered them with a pan. I just installed 2 nipple waterers in their pen. I tried to get them to go for it by smearing peanut butter on the toggle. They liked it and squirted some into one of their mouths. I just don't know if they figured it out and how can I make sur they got it? Any thoughts?